] Hamlet is a scholar, and he apparently had a great time at Wittenberg. If he had been able to go back there and not be (perhaps never be) King, it may have been fine with him. Hamlet doesn't seem that much like his father, who is an active, soldierly sort much like Fortinbras appears to be. Hamlet doesn't seem all that ambitious to be king. (He seems determine that Claudius will not be, though.)

pardon me but if a King has a competent living heir, than that person is King- period. It is immaterial whether or not Hamlet cared to be King, he WAS King, but for the fact that his uncle usurped his place. The fact that Hamlet did not come home and immediately claim his crown is part and parcel of his tragic flaw. The marriage, while certainly questionable, is secondary to the part that Claudius has upset the established laws of the succession of monarchy.